My daughter (age 5) has spent a lot of time lately with the book “Click Clack Moo, Cows that Type” by Doreen Cronin. She had been spending an hour or more a day looking at the book for four days in a row, before she finally asked me, “What’s a typewriter?” The best answer I was able to come up with was “It’s what your Grandmother used to write letters before Grandpa bought Mommy her first computer”.